155,266 species and infraspecific names are in the database, 21,864 images, 60,052 bibliographic items, 435,064 distributional records.

Pterosiphonia Falkenberg, 1897

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Rhodomelaceae
Tribe Pterosiphonieae

Holotype species: Pterosiphonia cloiophylla (C.Agardh) Falkenberg

Original publication and holotype designation: Schmitz, F. & Falkenberg, P. (1897). Rhodomelaceae. In: Die natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten insbesondere den Nutzpflanzen unter Mitwirkung zahlreicher hervorragender Fachgelehrten, Teil 1, Abteilung 2. (Engler, A. & Prantl, K. Eds), pp. 421-480. Leipzig: verlag von Wilhelm Engelmann.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Savoie, A.M. & Saunders, G.W. (2016). A molecular phylogenetic and DNA barcode assessment of the tribe Pterosiphonieae (Ceramiales, Rhodophyta) emphasizing the Northeast Pacific. Botany 94: 917-939, 8 figs.

Description: Thalli with compressed erect axes arising from a terete basal system; polysiphonous with 5(–6) pericentral cells; pericentral cells usually obscured by cortication (one to several layers); branching alternate and distichous, proximal segments of laterals congenitally fused with the bearing axis over 2–8 segments; vegetative trichoblasts lacking; prostrate system attached to the substrate by unicellular rhizoids. Tetrasporangia tetrahedral, developing in straight series near the apex, one per segment. Gametophytes dioecious, cystocarps or spermatangial branches developing subapically on laterals; spermantangial branches cylindro-conical, either lacking sterile apical cells or with 1(–3) sterile apical cells; cystocarps globular.

Information contributed by: A.M.Savoie & G.W.Saunders. The most recent alteration to this page was made on 8 Oct 2016 by M.D. Guiry.

Comments: Occurring on rocks or as epiphytes, littoral to subtidal, in temperate to tropical regions in widespread localities in the Atlantic and Indo-Pacific Oceans.

Numbers of names and species: There are 34 species names in the database at present, as well as 7 infraspecific names. Of the species names, 10 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Created: 28 December 2000 by M.D. Guiry

Verified by: 08 October 2016 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33076

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 May 2019.

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